Originally Posted by
bawm
For others reading, please note that this is completely incorrect. Each segment on a PNR can be ticketed separately (and even plated on different carriers). This wouldn't apply if you bought from ac.com of course.
bawm
This is very true. I have booked multi-leg itineraries through a TA. It is often cheaper to book with two separate tickets but with one PNR. (It's actually multiple PNRs as each carrier will issue their own). It doesn't change ACs responsibility in the case however.